SNMP Agent may not find a cache item

[Plinio16]

I am presenting an issue with Cacti/Spine, it is showing gaps between graphs. The error as the Log shows:

[quote]2021-08-28 21:15:00 - CMDPHP PHP ERROR NOTICE Backtrace: (/poller.php[705]:snmpagent_poller_exiting(), /lib/snmpagent.php[303]:CactiErrorHandler())
2021-08-28 21:15:00 - ERROR PHP NOTICE: Trying to access array offset on value of type bool in file: /opt/cacti/lib/snmpagent.php on line: 303
2021-08-28 21:15:00 - CMDPHP PHP ERROR NOTICE Backtrace: (/poller.php[705]:snmpagent_poller_exiting(), /lib/snmpagent.php[302]:CactiErrorHandler())
2021-08-28 21:15:00 - ERROR PHP NOTICE: Trying to access array offset on value of type bool in file: /opt/cacti/lib/snmpagent.php on line: 302[/quote]

Local Machine
[url=https://postimg.cc/mcRJmY3V][img]https://i.postimg.cc/mcRJmY3V/cacti.png[/img][/url]

A CIsco Device
[url=https://postimg.cc/Z9cg2WVm][img]https://i.postimg.cc/Z9cg2WVm/cacti1.png[/img][/url]

Server Details:

Date Sat, 28 Aug 2021 21:21:18 -0500
Cacti Version 1.2.16
Cacti OS unix
RSA Fingerprint ad:68:21:6f:8f:06:f0:6e:e3:7c:26:58:1e:03:91:b8
NET-SNMP Version NET-SNMP version: 5.8
RRDtool Version Configured 1.7.2+
RRDtool Version Found 1.7.2
Devices 584
Graphs 2,217
Data Sources SNMP Get: 591
SNMP Query: 1,047
Script/Command: 1,167
Total: 2,805

Interval 300
Type SPINE 1.2.16 Copyright 2004-2020 by The Cacti Group
Items Action[0]: 2,685
Action[1]: 1,167
Total: 3,852
Concurrent Processes Name: Main Poller, Procs: 1
Max Threads Name: Main Poller, Threads: 1
PHP Servers 1
Minimum Connections: Current: 5000, Min Required: 102
Assumes 100 spare connections for Web page users and other various connections.
The minimum required can vary greatly if there is heavy user Graph viewing activity.
Each browser tab can use upto 10 connections depending on the browser.
Script Timeout 25
Max OID 10
Last Run Statistics Time:298.5048 Method:spine Processes:1 Threads:1 Hosts:584 HostsPerProcess:584 DataSources:3852 RRDsProcessed:2307

[bmfmancini]

What PHP version are you using ?

[Plinio16]

[bmfmancini]

And is this happening every poll cycle? Check your logs for any poller time exceeding messege

…

On Sun., Aug. 29, 2021, 17:05 Plinio16, ***@***.***> wrote: [image: image] <https://user-images.githubusercontent.com/46384343/131265310-4662dad9-c7ba-415b-bdf0-321b028f58b5.png> — You are receiving this because you commented. Reply to this email directly, view it on GitHub <#4382 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/ADGEXTDRLO6VTMZTPHJUQ7TT7KOJFANCNFSM5C7XWJ3A> .

[netniV]

I've pushed a change to correct the error but the reason is that the poller is overrunning I believe.

[TheWitness]

This would appear to be a correct change.

[TheWitness]

@Plinio16, please pull a fresh copy of lib/snmpagent.php from the 1.2.x branch and report back on your findings.